Blog Time

这次写一个小程序来解析 X.509 证书的内容，主要涉及到 Base64 解码、ANS.1 结构的 DER 解码和 Object ID

🚀 代码: Github

上个月用Golang和Cpp实现了 DES 算法，这次用Cpp来实现一个 MD5 算法，与 DES 相比，MD5 还是算比较简单的。

🚀 代码: Github

Problem

LeetCode 218. The Skyline Problem

Difficulty : Hard

A city’s skyline is the outer contour of the silhouette formed by all the buildings in that city when viewed from a distance. Now suppose you are given the locations and height of all the buildings as shown on a cityscape photo (Figure A), write a program to output the skyline formed by these buildings collectively (Figure B).

Problem

LeetCode 128. Longest Consecutive Sequence

Difficulty : Hard

Given an unsorted array of integers, find the length of the longest consecutive elements sequence.

Your algorithm should run in O(n) complexity.

这里使用 Golang 来实现一个 JPEG 编码器，并且将其结果与 GIF 格式做一个比较

🚀 代码: Github

这是一个参考Android Architecture Components中的架构设计方案，UI 上尽可能符合Material Design的小项目。

这次在 Android 上实现一个可以选歌以及后台播放的音乐播放器，主要涉及到的技术有 Android 中的 Service 以及RxJava。

Problem

LeetCode 174. Dungeon Game

Difficulty : Hard

The demons had captured the princess (P) and imprisoned her in the bottom-right corner of a dungeon. The dungeon consists of M x N rooms laid out in a 2D grid. Our valiant knight (K) was initially positioned in the top-left room and must fight his way through the dungeon to rescue the princess.